Q. A can finish a work in 28 days and B in 42 days. If both work together, how long will it take?
✅ Correct Answer: (B)
16 days
Explanation: 1 day’s work = 1/28 + 1/42 = 5/84. Time = 84/5 = 16.8 ≈ 16 days.
Explanation by: Ankit Singh
1 day’s work = 1/28 + 1/42 = 5/84. Time = 84/5 = 16.8 ≈ 16 days.